Manufacture of plates of sheet metal and bands.



A. SGHWIEGER. MANUFACTURE OF PLATES 0F SHEET METAL AND BANDS.

APPLICATION FILED OCT. 15, 1907. 962,058, Patented June 21, 1910.

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Specification of Letters Patent.

Patented June 21, 1910.

To all whom it mayconcem: I

Be it known that I, ARNOLD Sonwmona, engineer, a subject of the GermanEmperor, and residing at No. 36 Stralauer Allee, Berlin, in the Kingdomof Prussia and German Empire, have invented certain new'and usefulImprovements in the Manufacture of Plates of Sheet Metal and Bands, ofwhich the following is a s ecification.

This invention re ates to im rovements in It consists in firstmanufacturin from the metal block a pipe and in cutting the same openWhile it is still in the matrix, or after it has come out, and inspreading or rolling it out into a plate or band. The cutting can beeflected by providing the matrix, or the core-bar, with one or severalknife-like ribs, or in arranging on the outside, in front of the openingof the matrix, a. circular saw. In the first case the ipe formed in thematrix is at once divide by the knife-like ribs, so that it leaves thepress as a gutter, which is then spread out by the rollers and uniformlyflattened.

The present invention relates particularly to the matrix or die elementof the machine and is intended as a further improvement over thatarrangement which forms the bases of my patents bearing the numbers861,194 and 878,092.

The drawing illustrates a form of construction of the 'press used inthis process, in which" Figure 1 is a side elevation part1 in'sec ow twotion; and Figs. 2 t0'5 (inclusivegns different forms of theslittingivesconnected with the core-bar.

The driving-gear for the press-stem 10 and the core-bar 11 is omitted inFig. 1 for the sake of simplicity. The frame 12 is provided with thepress-cylinder 13, with the exchangeable matrix 14 and, at the upperend, with a preferably hydraulic cylinder 15, whose piston 16 carriesthe so-calledmonkey or rammer. On the rammer is arranged a bracket 18carrying an electromotor 19 which drives a roller 20 journaled in thefork of the rammer. The rotary movement of the press-roller 20 can thusproceed uniformly Applicatlon flled October 15, 1907. Serial No.397,578.

' independent}; of its height, and also at any desired spee In front ofthe opening of thematrix is arranged a press-table 21, in which there isjournaled an adjustablearm 22 pivoting on 23, which carries at oneend-the counterpressure roller 25 and at the other the motor 24 drivingthe latter. The matrix 14 may be of the cross-section shown in Figs. 2and 3 or Fig. 4. i

In the form of construction according to Figs. 2 and 3 the core-bar 11is pointed at its front end and provided with the knife-like rib 26,which preferably. partly enters into a cut provided in the matrix inorder to make sure that the pipe is properly cut. The deeper thecore-bar enters into the wall of the matrix the thinner will be the pipeand the sheet-metal.

In the form of construction according to Figs. 4 and 5 the end of thecore-bar working" in the matrix .is cylindrical. On the other hand oneor several knives 26 have been inserted which set against the matrix,and in this way cut the pipe. hen the pipe 27, after it has been formedand slit, leaves the matrix it runs upon the pressroller 25 and isspread out and pressed by the press-roller 20, which is lowered by meansof the driving apparatus 15, 16. As the two rollers 20 and 25 rotate inopposite directions they effect a reliable stretching of the metal. Thespeed of the rollers depends, of course, on that at which the metalleaves the opening of the matrix.

In the form of construction ofthe press shown in the drawingelectromotors have been provided for driving'the press-rollers. Theymay, of course, be driven in any other way without changin thereby theessential feature of the invention, the two press-rollers may likewisebe moved up and down by other means than those mentioned.

through and a mandrel with ih the cyllnder The forefohg s ificationsigned et Bert ozhrgvi ea $311 a taperedf exild lying Wlthig Im the 2nday o ctober 1907.

retri opemng o t e matrix sai mandrel having a cutting member mo untedARNOLD SCHWILGLR' 6 thereon adjacent ite ta pered end adapted to Inpresence of two witnesses:

slit the tube as it 18 expressed through the WOLDEMAR IIAUPT,

cylinder by the piston. Hlmnr Harms.-

